Apple's new Mac Pro

AFP / AFP/Getty Images

The new cylindrical Mac Pro is displayed at Moscone Center during Apple's Worldwide Developer Conference (WWDC) in San Francisco on June 10, 2013. Apple unveiled its hotly anticipated iTunes Radio Service, as the iconic maker of the iPhone moved to challenge streaming music operators like Pandora and Spotify. AFP PHOTO/Josh Edelson (Photo credit should read Josh Edelson/AFP/Getty Images)

The new cylindrical Mac Pro is displayed at Moscone Center during Apple's Worldwide Developer Conference (WWDC) in San Francisco on June 10, 2013. Apple unveiled its hotly anticipated iTunes Radio Service, as the iconic maker of the iPhone moved to challenge streaming music operators like Pandora and Spotify. AFP PHOTO/Josh Edelson (Photo credit should read Josh Edelson/AFP/Getty Images) (AFP / AFP/Getty Images)

The new cylindrical Mac Pro is displayed at Moscone Center during Apple's Worldwide Developer Conference (WWDC) in San Francisco on June 10, 2013. Apple unveiled its hotly anticipated iTunes Radio Service, as the iconic maker of the iPhone moved to challenge streaming music operators like Pandora and Spotify. AFP PHOTO/Josh Edelson (Photo credit should read Josh Edelson/AFP/Getty Images)